2009-3525 | Linux Foundation Xen grub.conf access control (Bug 525740# / BID-36523)


CVSS Meta Temp Score

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Current Exploit Price (≈)

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CTI Interest Score

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8.4 $5k-$25k 0.06

A vulnerability classified as critical was found in Linux Foundation Xen 3.0.3/3.3.0/3.3.1 (Virtualization Software). This vulnerability affects an unknown code block of the file grub.conf. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 10/05/2009 by Jan Lieskovsky as Bug 525740# as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability was named CVE-2009-3525 since 10/01/2009. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/23/2021). The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 67935 (Oracle Linux 5 : xen (ELSA-2009-1472)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165223 (SUSE Security Update for Multiple Packages (SUSE-SR:2010:012)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Vulnerability Center (SBV-23607) and Tenable (67935). Entries connected to this vulnerability are available at 52021, 52680, 52226 and 52111.

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VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.4
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Class: Privilege escalation
CWE: CWE-264
ATT&CK: T1068

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍


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Nessus ID: 67935
Nessus Name: Oracle Linux 5 : xen (ELSA-2009-1472)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 880684
OpenVAS Name: CentOS Update for xen CESA-2009:1472 centos5 i386
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

09/25/2009 🔍
09/25/2009 +0 days 🔍
10/01/2009 +5 days 🔍
10/05/2009 +4 days 🔍
10/05/2009 +0 days 🔍
10/05/2009 +0 days 🔍
07/12/2013 +1376 days 🔍
03/18/2015 +614 days 🔍
08/23/2021 +2350 days 🔍Vendor: https://www.linuxfoundation.org/

Advisory: Bug 525740#
Researcher: Jan Lieskovsky
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-3525 (🔍)
OVAL: 🔍

Vulnerability Center: 23607 – Xen 3.0.3, 3.3 and 3.3.1 Pygrub Bootloader Local Authentication Bypass Vulnerability, Medium
SecurityFocus: 36523 – Xen pygrub Local Authentication Bypass Vulnerability

See also: 🔍

Created: 03/18/2015 15:15
Updated: 08/23/2021 14:15
Changes: (1) source_nessus_risk
Complete: 🔍

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